20608197 has 4 divisors (see below), whose sum is σ = 27477600. Its totient is φ = 13738796.

The previous prime is 20608187. The next prime is 20608213. The reversal of 20608197 is 79180602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20608197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20608127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3434697 + ... + 3434702.

It is an arithmetic number, because the mean of its divisors is an integer number (6869400).

Almost surely, 2^20608197 is an apocalyptic number.

It is an amenable number.

20608197 is a deficient number, since it is larger than the sum of its proper divisors (6869403).

20608197 is an equidigital number, since it uses as much as digits as its factorization.

20608197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6869402.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 20608197 is about 4539.6252047939. The cubic root of 20608197 is about 274.1658336875.

Adding to 20608197 its reverse (79180602), we get a palindrome (99788799).

The spelling of 20608197 in words is "twenty million, six hundred eight thousand, one hundred ninety-seven".